Cassia is an aromatic bark, similar to cinnamon, native to southern china, bangladesh, india and vietnam. It is primarily used for its aromatic bark, which is used as spice. The buds are also used as spice, especially in india. cassia is produced in both china and vietnam. cassia bark is used as a flavouring agent for confectionary, desserts, pastries and meat, it is specified in many curry recipes. Where chinnamon is less suitable. cassia is collected in spring and summer and dried in the shade used in the sun or in the shade used in decoction has analgesic and antipyretic properties.